package alg20241101;

public class Text {
    public static void main(String[] args) {

    }
    public int mySqrt(int x) {
        if(x < 1) return 0;
        long left = 0, right = x;
        while(left < right){
            long mid = left + (right - left + 1) / 2;
            if(mid * mid <= x){
                left = mid;
            }else{
                right = mid - 1;
            }
        }
        return (int)left;
    }
}
